Smart watch



FIG. 1 is a perspective view of a smart watch showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view, not shown, being the same as the front elevational view;

FIG. 3 is a right-side elevational view thereof, the left-side elevational view, not shown, being the same as the right-side elevational view;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the smart watch that form no part of the claimed design. 

CLAIM The ornamental design for a smart watch, as shown and described. 